Adjustable drawing frame



Jan. 27, 1942. B. w. GossETT E-r AL 2,271,191

ADJUSTABLE DRAWING' FRAME Filed Oct. 5, 194C 5 Sheets-Sheet 1 6% @of/8 @l G9 i Y t nventors:

l0 4, BRYANT W GOSSETT El. flV/JLTEQ Cns/N mamar-:e

Cttornegs Jan. 27, 1942.

B. W. Gosse-.TT ETAL 2,271,191

ADJUSTABLE DRAWING FRAME Filed oct. 5, 1940 3 Sheets-Sheet 2 @@BRYAM' W @USSL-:TT

WnLYv-ee CnswL/Naaseaee rwentors Gttornegs Jan- 27', 1942 B. w. GossE'rT ET AL 2,271,191

ADJUSTABLE DRAWING FRAME Filed oct. 5, 1940 s sheets-sheet s BRYQNT W. ErossE'r-r "0 Wmen Casa/n meas/ease Snventor .5

Ctttornegs Patented Jan. 27, 1942 ADJUSTABLE DRAWING FRAME Bryant W. Gossett and Walter Casbin Lineberger, Gastonia, N. C., assignors to Bryant W.

Gossett, Gastonia, N. C.

Application October 5, 1940, Serial No. 359,850

`(Cl. 19 13G) 11 Claims.

This invention relates to textile fiber preparation machinery and more especially to an improved drawing frame, which is employed for the parallelization of the fibers. Specifically the invention comprises a draw frame having means for varying the distances between the sets of draft rolls in combination with an adjustably mounted-drive for a stop motion.

In the manufacture of rayon, acetate, and cotton yarns, the material is delivered to the mill in bales. Subsequent to delivery, the material is passed through bale breakers, openers, and the like to remove impurities therefrom and then it is run through pickers. to form laps. These laps are carded and condensed into slivers. In order to further even the product and to parallelize the fibers, several of these strands are simultaneously passed through sets of drawing rolls, such as shown in the accompanying drawings, and. these strands emerge from the drawing rolls in a single strand which is usually about the same size as one of the several strands which enter. Due to the fact that the speed of thesets of rolls progressively increases from the back set to the frontset, there isa resultant draft in the fibers which serves to parallelize them. From the finaly drawing process, this strand is run through fly frames and spinning frames which serve to reduce the count of the yarn and to supply the necessary twist.

.During recent years, the mills have been using much rayon ber having a staple length of two inches or more. As is well known, cotton has a staple length of 1% to approximately 11/2. Since'the distance between the sets of drawing rolls are usually determined by the length of staple, it is seen that a problem is encountered in adapting the old cotton drafting frames for drafting long staple rayon fiber. Not only is it necessary to provide a new means for varying the distance between the sets of rolls, but it is also necessary to adapt this new mechanism to the drawing frame stop motion so that its operation will not b-e adversely affected.

It is, therefore, an object of this invention to provide a drawing frame having a plurality of interconnected adjustable sets of drafting rolls and a stop motion therefor, in combination with a train of adjustable gears for' driving the rolls and a second train of adjustable gears driven by the nrst train for driving the stop motion. Of course, there is an adjustable connection between the stop motion and the second train of gears. In other words, the two trains of gears are connected in series. Since they are adjustably mounted, the overall length of the two trains can be easily varied to suit the distances between. the rolls vwithout disturbing the operation of the stop motion.

`Some of the objects of the invention having been stated, other objects will appear as the description proceeds, when taken in connection with the accompanying drawings, in which- Figure `1 is a plan view of the two ends of a drawing frame, the central portion thereof being broken away, showing the present invention embodied4 therein; f

Figure 2 is a vertical' transverse sectional View taken along the line 2 2 in Figure 1;

Figure 3 is a vertical transverse sectional View taken along the line 3 3 in Figure 1;

Figure 4 is a vertical transverse sectional View taken along the line 4 4 in Figure 1;

Figure 5 is an end elevationlooking along the line 5 5 in Figure 1;

Figure 6 is an isometric View, with certain portions thereof broken away and other portions omitted, showing the stop motion mechanism employed in the draw frame;

Figure 7 is a sectional View similar to the righthandiportion of Figure 3, but showing the position of the stop motion lever as it appears when it is in operation;

Figure 8 is a sectional detail View taken along the line 8 6 in Figure 1;

Figure 9 is a sectional detail view taken the 'line' 9 9 in Figure 1.

lReferring more specifically to the drawings, the'numerals I0 andA II denote the end frames of a drawing mechanism which are secured together by means of a longitudinally disposed supporting member I2. Member I2 has'a flat upper surface which serves as a support for roll stand brackets I4, I5, and I6, each of said brackets having a slot Il disposed therein in which bolts I8 are adapted to be adjustably mounted. Each of the bolts have their upper ends threadably'secured in blocks or roll stands which support sets of draftingl rolls. bottom drafting rolls, namely 20, 2|, 22 and 23 which are supported by roll stands 24, 26, 26 and 27, respectively. Each of thesev stands is secured inv adjusted position onr its respective bracket by means of a stud bolt I8. When it is desired to vary the distance between the abovenamed stands, it is only necessary to loosen the stud bolts I8 and then move the stands and the associated rolls to the desired position and then againy tighten the bolts. Bottom rolls 20, 2l, 22 and 23 have -top rolls 30, 3l., 32 and 33, respecalong For example, there are four` 2 tively mounted tliereabove, said top rolls likewise being supported by the stands 24 to 21, respectively.

During the operation of the draw frame, a plurality of slivers 36, 31, 38, 39, 40 and.4| are fed into the draw frame over spoons 42, and then between rolls 23 and 33, rolls 22 and 32, rolls 2| and 3|', and rolls 20 and 30 to effect the necessary drafting operation on the respective strands. The slivers are then condensed into a single strand lill, which passes downwardly through eyelet 45 and between rollers 46 and 41, from whence it is deposited into a suitable container not shown.

Each of the spoons 42 is pivoted intermediate its ends upon a longitudinally disposed bar 50 (Figures l and 4) which bar is supported beneath an apron member 5|, said apron in turn, being supported by the brackets I4, I5, and I6, The lower end of each spoon has a hooked portion y52, the lower end of which is normally held in elevated position by the tension and weight ofA` the strand on its upper end, as shown in Figure 4. In this position, the upper endl of lever arm 56 will clear the hook end 52 as it oscillates back and forth thereunder, along with shaft 51. Upon the breakage of a sliver which is supported by the upper endof the spoon, the hooked portion 52 will drop into the path of arm 56 and thereby causethe stop moti-on to be actuated in a manner to be hereinafter described.

The rollers 46 and 41 have gears 59 and 6 0,

respectively on each end thereof, which mesh with each other. The ends of the rollers 46 and ti1 are journaled in the brackets I4 and I6. Roller il has a shaft 41a extending therefrom upon which a -gear 62 is fixedly secured and this gear is driven from front bottom roll drive shaft 63- through the medium of gears 64, 65, 66, 61 and 68. Gear 63 is iixedly securedon drive shaft 63, said drive shaft being a continuation of thefront bottom roll 26.

The end of drive shaft 63.is journaled in bearing 69 which in turn is supported by end frame I6; A fixed pulley 10. is mounted on the shaft 63A and upon the pulley' a'belt 1I is adaptedto be mounted during normal operation. Also a loose or idler pulley 12 is mounted on shaft 63along side pulley 10. This'idlerpulley is adapted toI receive the belt 1| when it is desired to stop the machine.

As heretofore stated, the drive shaft 63v is Acon nected to the bottom front roll which extends longitudinally of the drawing frame. beyond the bracket I6 (see Figure 1) theend of bottom roll 20 has a pinion 15 mounted thereon,

said pinion meshing with a pinion 16. The pinion 16. has integral therewith a smaller pinion 11v and `both of these pinions 16 and11 are rotatablyV mounted upon a stud 18 (see Figure 5).

Pinion 11 meshes with a pinion 19 on the `end .ofA

bottom roll 2 I When the distance between the bottom rolls 20 and Y2|` is varied, it is necessary to adjust the position of the intermediate gears or pinions 16A and 11, to cause them to properly mesh. Thisadjustment is partially efectedby means of a horizontal slotv 80 in theupper end of a plate 8|, said `plate 8| Yhaving ,a slot 82 near thelower end thereof which isv penetrated by a bolt 83.v

Bolt 83` is secured to a bracket 84 rising from the supporting member |2. By virtue of the slot 80, the gears 16,,and 11 can be adjusted horizontally and by means of the slot 82 these same gears can be adjustedvertically, thereby insuringthat pin,-

Ata pointk ions 16 and 11 will mesh with their respective gears.

By referring to Figures 1 and 2, it is seen that a bracket is supported bythe table member I2. The upstanding leg of this bracket cantilevers to the left of this table member for supporting the end of shaft 41a and also for supporting the gears 64, 65, 6.6 and 61. The top edge of the upstanding leg of bracket 90 has a notch 9| therein for accommodating a suitable bearing 92 which, in turn, supports the shaft 63 previously described. Around the shaft 63 and disposed adjacent one face of the upstanding leg of bracket 9,0v is a plate 95, said plate having areuate slot 9,4 therein which is penetrated by al bolt 91. Bolt 91 also penetrates the upstanding leg of bracket 90. Since this slot is arcuateand has its center about the shaft 63, itis seenl that the plate 95 can be rotated about the shaft 63 within the limits of the length of the slot.

The upper endI of the plate 95 has a notch 99- cut therein for the receptionof a, stud |00. ThisA stud has gears |0-| and |02vv rotatably mounted thereon, both of saidl gears being adapted' to rotate in unison. Gear |0-Il is driven by a gear |0|lJ which isv xedly secured around shaft 63. The

gear |02 meshes with a gear |06 which geargalso meshes with another gear |01, both the gears l |66 andr` |01 being rotatably mounted uponplate LILI, said.. plate being pivoted as Vat II2- to the of.l plate whose center. is pivot point |I12..

one of the interiorly threaded holes |I5a inthe upstanding leg of bracket |08. By` so mounting they gears standing leg thereof, Which rests upon-the topv Slot. I09-fis penetrated byy of.` table. member I2: stud bolts lli), Whichbolts.. are loosenedvwhen it.is desired to adjust theposition of the bracket.r |93: and its associated.gearsY IIJIland` |01 onthe- `The, backroll ,2.3, hasa gear I IMI-lxedly secured.y

on the end thereof,- whichiisdrivenbyA the. gear' |01. frame avs'showninFiguresl and 5,I and -hasa gear I I6 Lmounted thereon, said gear ||6 meshingv witha gear ItlI; which gear II1,forms an integral parteiA another gearY llt-r` Both of the:v gears, I I] and Harare,rotatablyvmountedupon: The. gear, I I3; also meshes with a',`

a.. Stud, l I9. pinionfl .29:10u the endet bottom roll `2:2..

When .the position 0f the, bottom rolls. 2x2 and 23; is,chang,ed it,is,n ecessaryto, vary the positions ofthe, gears, II'Ian,d IIqto4 cause'these gears to properly mesh with therrespective rinionsontheends ofthe. rolls. In .Order to provide v this ajusfmelllira .Sutble horizontal slot |25 `is f.

provided in the upperendof` aplatevmember |26, saidyplate member ,also A,havn-1g a vertically dis- |06. and. |01, the positions can bey changed to suit various settings of the drafting The back roll 23 extends the,` length of the.,

2,271,191; plate 95 and its associated gears |0| and |02 about the shaft 63, and by adjusting the position of the bracket |08 and its associated gears |06 andv |01, through the medium of slot |09 and ||3, this last-named adjustment can be effected (see Figure 6).

When the distances between the sets of rolls are varied it is also necessary to make adjustments to insure that the stop motion will be properly driven. In otherwords, when the back roll 23 has its position changed, the associated gear |I4 will likewise have its position changed, and consequently, the geared connection between gear ||4 and the stop motion must be adjusted accordingly.

The gear ||4 is adapted to mesh with a gear |30, said gear meshing with a smaller gear |3|. Both of these gears |30 and |3| are rotatably mounted upon a plate |32 which in turn, is secured to bracket I4 (see Figure 8) by any suitable means such as bolt |33. The downstanding leg of bracket I4 has a longitudinally disposed slot |35 therein for the accommodation of the bolt |33 and also to permit the adjustment of the plate |32 longitudinally thereof.- Also the downstanding leg of bracket I4 has a groove |36 which accommodates a projection |32a on the plate |32. This projection permits the plate |32 to be held in position relative to the bracket I4 by using only one bolt |33. It is therefore seen that the gears |30 and |3| can be moved longitudinally of the bracket to conform to the adjustment made of the train of gears |I, |02, |06, |01 and |I4 which drives the back bottom rollers 22 and 23.

The gear I3| has a pin |40 extending from one face thereof which penetrates a slot |4| in a lever 42, said lever being pivoted as at |43 to a short arm |44. This short arm is fixed on shaft |45, which shaft has its end rotatably mounted on bracket |46, said bracket being secured to the downstanding leg of table member |2. the shaft |45, this shaft will oscillate back and forth during the rotation of the gear I 3|. By referring to Figures 4 and 6, it is seen that the shaft |45 has an upstanding lever |48 xedly secured thereon. The upper end of this lever has a horizontal link |49 secured thereto, which link has its other end secured to the upper end of another lever |50 and the lower end of lever |50 is flxedly secured on previously described shaft 51. As heretofore stated, shaft 51 has fixed thereon an arm 56, the upper end of which oscillates back and forth beneath the hooked portion 52 of spoon 42 when the drawing frame is in operation.

By observing Figures 2, 3, 6 and 7, it will be noted that the lower end of the stop motion lever |42 has an arcuate projection |55 which partially encircles the shaft |45. A counterweight |51 is pivoted `as at |58 to the bracket |46. The weight |51 has an upwardly projecting portion |56a which passes on the far side of the arcuate portion |55 as seen in Figures 6 and 7. This portion |56a has a lateral projection |56 which projects toward the observer in Figures 6 and 7, and thus the weight of member |51 holds members |42 and |44 in alinedposition as long as shaft |45 is allowed to oscillate. This counterweight has an upstanding leg |59 which is adapted to rest in notch |60 in sleeve |6I, said sleeve being mounted upon a shaft l 62, which, in turn, is slidably mounted in bracket Since the arm |44 is xedly secured uponl |63. The sleeve |6| is slidably mounted in bracket |46.

The end of the sleeve |6| and the end of shaft |62 nearest the observer have flxedly secured thereon a forked arm |65, said fork being adapted to encircle the belt 1|. A compression spring |66 is mounted around the shaft |62 and between the bracket |63 and sleeve |6I. This compression spring normally tends to force the notch |60 into engagement with the upper end of upstanding arm |59. In the position shown in Figure 6, the belt 1| is mounted' on the fixed pulley: 10, but upon the breakage of one of the strands 36 to 4| inclusive, the hooked portion 52 on the lower end of spoon 42 will drop downwardly into the path of the rupper end of oscillating arm 56. This will prevent the oscillation of the arm 56, but since it is positively driven through the medium of gears |0I, |02, |06, |01, ||4, |30 and |3I, pin |40,lever |42, arm |44, shaft |45, lever |48, link |49, lever |50 and shaft 51, there must be some flexible member which will yield or give way to prevent breakage of the parts. This yielding is effected around pivot point |43 between the arm |44 and lever |42. In other words, the portion |44 remains stationary when the arm 56 engages hook 52, but the lever |42 is caused to rotate about pivot point |43 to the position shown in Figure 7. This movement will raise the arcuate portion |55 and thereby cause the projection |56 and the counterweight |51 to be raised. Upon the raising of the counterweight, the vertical arm |59 will be moved out of the notch |60 to thereby allow the compression spring |66 to move the shaft |62 and forked portion |65 toward the observer in Figures 1 and 6 to cause the belt 1| to be shifted from the fixed pulley 10 to the loose pulley 12 and thereby stop the machine.

The sleeve |6| has integral therewith a lever |10 which extends radially therefrom and has a slot |1| therein, said slot encircling the shaft |45. This lever prevents rotation of the sleeve |6| and the shaft |62 and thereby holds the notch |60 in its proper position for the reception of the upstanding arm |59.

The purpose of the slot |4| in the stop motion lever 42 is to permit the movement of gears |30 and |3I longitudinally of the supporting bracket I4.

It is therefore seen that in the present embodiment of the invention there is disclosed means whereby a substantial amount of adjustment of the distances between the sets of drawing rolls can be effected by adjusting interconnecting driving gears therefor. Also this adjustment can be made without affecting adversely the operation of the stop motion mechanism since the slot |4| permits the driving train of gears for the stop motion lever to occupy various positions relative thereto.

In the drawings and specification there has been set forth a preferred embodiment of the invention and although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being set forth in the appended claims.

We claim:

1. In a drawing frame for slivers and the like, having a plurality of sets of drafting rolls between which the strands pass with means for varying the distance between said sets of rolls and having also a train of interconnecting gears for driving said rolls, means for adjusting the` position of the rolls to vary the distance therebetween, means for individually adjusting the position of some of the gears to cause the length of the train to conform to the adjustment between the sets of rolls, a stop motion lever and a second train .of adjustably mounted gears driven by said iirst train, said second train also being adjustably mounted for movement relative. to the stop motion lever, said lever having a sliding connection with said second train of gears whereby said second train of gears can be moved relative to said lever when the length of the first train of gears is varied, while maintaining connection between the stop motion lever and the second train of gears.

2. In a drawing frame for slivers and the like having a plurality of sets of drafting rolls between which the-slivers pass with means for varying the distance between said sets of rolls, a train of gears for driving said rolls, means for varying the overall horizontal distance between the end gears of the train, a stop motion lever operable by said train of gears, and an adjustable connection between said lever and said train of gears whereby the distance between the lever and the gears can be varied, without disrupting the connection between the train of gears and said lever.

3. In a drawing frame for iibers having a plurality of sets oi drawing rolls, each set vcomprising a top and bottom drawing roll, said bottom rolls being geared together for rotation and said frame having means for adjusting the distance between the sets of drawing rolls, a stop motion mechanism, a geared connection between the rear bottom drawing roll and the stop motion mechanism, and means movably mounting the last-named geared connection relative to the stop motion, and means for maintaining the connection between the stop motion mechanism and the geared connection when the two are moved relative to each other.

45111. a drawing frame for fibers having a plurality of sets of drawing rolls, each set comprising a top and bottom drawing roll, said bottom rolls being geared together for rotation and said frame having means for adjusting the distance between the sets of drawing rolls, a stop motion mechanism, a geared connection between the rear bottom drawing roll and the stop motion mechanism, means for slidably mounting the last-named geared connection relative to the stop motion, and means for maintaining the connection between the stop motion mechanism and the geared connection when the two are moved relative to each other.

5,. In a drawing frame for bers having a plurality of sets of drawing rolls, each set comprising top and bottom drawing rolls, said bottom rolls being geared together for rotation and said frame having means for adjusting the distance between the sets of drawing rolls, a stop motion mechanism, a geared connection between the rear bottom drawing roll and the stop motion mechanism, means movably mounting the last-named geared connection relative to the stop motion, said stop motion mechanism including a member having an extended slot therein and one of the gears in the last-named connection between the rear bottom drawing roll and the stop motion mechanism having a pin therein penetrating said elongated slot; whereby when said last-named geared connection is moved to follow the adjustment of the position of the drawing rolls, the pin will remain in said slot to operate the stop motion mechanism regardless of the position of the drawing rolls.

6. In a drawing frame for fibers having a plurality of sets of drawing rolls, each set comprising top and bottom drawing rolls, said bottom rolls being geared together for rotation and saidframe having means for adjusting the distance between the sets of drawing rolls, a stop motion mechanism, a geared connection between the rear bottom drawing roll and the stop motion mechanism, means for slidably mounting the last-named geared connection relative to the stop motion, said stop motion mechanism including a member having an extended slot therein and one of the gears in the last-named geared connection between the rear bottom drawing roll and the stop motion mechanism having a pin therein penetrating said elongated slot, whereby when said last-named geared connection is moved to follow the adjustment of the position of the rolls, the pin will remain in said slot to operate the stop motion mechanism regardless of the position of the drawing rolls.

'7. In a drawing frame for fibers having a plurality of sets of drawing rolls, each set comprising top and bottom drawing rolls, said 'bottom rolls being geared together for rotation and said frame having means for adjusting the distance between the sets of drawing rolls, the driving connection between all of the bottom rolls being adjustable as to position to maintain driving contact between all of the rolls, regardless of distances apart to which they are adjusted, a stop motion mechanism, a geared connection between the rear bottom drawing roll and the stop motion mechanism, means movably mounting the last-named geared connection relative to the stop motion, and means for maintaining the connection between the stop motion mechanism and the last named geared connection when the two are moved relative to each other.

8. In a drawing frame for fibers having a plurality of sets ofl drawing rolls', each set comprising top and bottom drawing rolls, said bottom rolls being geared together for rotation and said frame having means for adjusting the distance between the sets of drawing rolls, the driving connection between all of the bottom rolls being adjustable as to position to maintain driving contact between all of the rolls, regardless of distances apart to which they are adjusted, a stop motion mechanism, a geared connection between the rear bottom drawing rolls and the stop motion mechanism, and means slidably mounting the last-named geared connection re1- ative to the stop motion, and means for maintaining the connection between the stopy motion mechanism and the last named geared connection when the two are moved relative to each other.`

9.. In a drawing frame for fibers having a plurality of sets of drawing rolls, each set comprising top and bottom drawing rolls, said bottom rolls being geared together for rotation and said frame having means for adjusting the distance between the sets of drawing rolls, the driving connection between all of the bottom rolls being adjustable as to position to maintain driving contact between all of the rolls regardlessoi distances apart to which they are adjusted, a stop motion mechanism, a geared connection between the rear bottom drawing roll and the stop motionl mechanism, means movably mounting the last-named geared connection relative to the stop motion, said stop motion mechanism including a member having an extended slot therein and one of the gears in the lastnamed connection between the rear bottom drawing roll and the stop motion mechanism having a pin therein penetrating said elongated slot, whereby when said last-named geared connection is moved to follow the adjustment of the position of the drawing rolls, the pin will remain in said slot to operate the stop motion mechanism, regardless of the position of the l drawing rolls.

10. In a drawing frame for bers having a plurality' of sets of drawing rolls, each set comprising top and bottom drawing roll, said bottom rolls being geared together for rotation and said frame having means for adjusting the distance between the sets of drawing rolls, the driving connection between all of the bottom rolls being adjustable as to position to maintain driving contact between all of the rolls regardless of distances apart to which they are adjusted, a stop motion mechanism, `a geared connection between the rear bottom drawing roll and the stop motion mechanism, means for slidably mounting the last-named geared connection relative to the stop motion, said stop motion mechanism including a member having an extended slot therein and one of the gears in the last-named geared connection between the rear bottom drawing roll and the stop motion mechanism having a pin therein penetrating said elongated slot, whereby when said lastnamed geared connection is moved to follow the adjustment of the position of the rolls, the pin will remain in said slot to operate the stop motion mechanism, regardless of the position of the drawing rolls.

11. In a drawing frame for slivers and the like, comprising a stationary front bottom roll, a second bottom roll disposed rearwardly and adjacent the front roll and being adjustably mounted relative to the first roll, an adjustably geared connection between said rolls whereby a driving connection can be maintained when the distance between the rolls is varied, a third bottom roll adjustably disposed rearwardly and adjacent the second roll, a fourth bottom roll disposed rearwardly and adjacent the third bottom roll, a second adjustable geared connection between said third and fourth bottom rolls, whereby a driving connection can be maintained when the distance between the third and l fourth rolls is varied, a top roll for each of said bottom rolls, an adjustable geared connection between said rear bottom roll and said front bottom roll to permit a driving connection to be maintained when the distance between the front and fourth rolls is varied, a stop motion shaft mounted for oscillation on said frame, a slotted lever secured to said shaft, an adjustable train of gears driven by said adjustable geared connection between the front and rear rolls, an eccentrically located pin projecting from theyface of one of the gears in the train, said pin normally penetrating said slot in the stop motion lever, whereby when the gears rotate the eccentric pin will cause the stop motion lever to oscillate and whereby a driving connection will be maintained when the positions of the adjust-able train of gears is changed relative to the lever.

BRYANT W. GOSSETT. WALTER CASBIN LINEBERGER. 

